期刊
ACS NANO
卷 10, 期 5, 页码 5293-5303出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.6b01298
关键词
emissive graphene oxide quantum dots; conductive graphenic ribbons; coal; supercritical fluids; bioimaging
类别
资金
- University of Bordeaux
- IdEx postdoctoral fellowship
- French State in the frame of the Investments for the future Programme IdEx Bordeaux [ANR-10-IDEX-03-02]
- National Institutes of Health [GM077173]
This paper rationalizes the green and scalable synthesis of graphenic materials of different aspect ratios using anthracite coal as a single source material under different supercritical environments. Single layer, monodisperse graphene oxide quantum dots (GQDs) are obtained at high yield (55 wt %) from anthracite coal in supercritical water. The obtained GQDs are similar to 3 nm in lateral size and display a high fluorescence quantum yield of 28%. They show high cell viability and are readily used for imaging cancer cells. In an analogous experiment, high aspect ratio graphenic materials with ribbon-like morphology (GRs) are synthesized from the same source material in supercritical ethanol at a yield of 6.4 wt %. A thin film of GRs with 68% transparency shows a surface resistance of 9.3 k Omega/sq. This is apparently the demonstration of anthracite coal as a source for electrically conductive graphenic materials.
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